testo 252 Bedienungsanleitung Seite 97

CAL dAtA
page 49
Measuring mode
Manual calibration with any chosen buffer solutions
The instrument is calibrating, "CAL" flashes on the
screen (duration of calibration: min. 20 sec, max.10
min). A signal sounds the end of the calibration
procedure.
After 2 point calibration, return to the measuring
mode with the page key via the CAL data.
pH measurement
25